<template>
  <div>
    <div class="card" style="margin-bottom: 5px">
      <el-input clearable @clear="load" style="width: 260px; margin-right: 5px" v-model="data.username" placeholder="请输入账号查询" :prefix-icon="Search"></el-input>
      <el-input clearable @clear="load" style="width: 260px; margin-right: 5px" v-model="data.name" placeholder="请输入名称查询" :prefix-icon="Search"></el-input>
      <el-button type="primary" @click="load">查 询</el-button>
      <el-button @click="reset">重 置</el-button>
    </div>
    <div class="card" style="margin-bottom: 5px">
      <el-button type="primary" @click="handleAdd">新 增</el-button>
      <el-button type="danger" @click="deleteBatch()">批量删除</el-button>
      <el-button type="info" @click="exportData">批量导出</el-button>
      <el-upload
          style="display: inline-block; margin-left: 10px"
          action="http://localhost:9999/admin/import"
          :show-file-list="false"
          :on-success="handleImportSuccess"
      >
        <el-button type="success">批量导入</el-button>
      </el-upload>
    </div>

    <div class="card" style="margin-bottom: 5px">
      <el-table :data="data.tableData" style="width: 100%" @selection-change="handleSelectionChange"
                :header-cell-style="{ color: '#333', backgroundColor: '#eaf4ff' }">
        <el-table-column type="selection" width="55" />
        <el-table-column prop="username" label="账号" />
        <el-table-column prop="name" label="名称" />
        <el-table-column prop="phone" label="电话" />
        <el-table-column prop="email" label="邮箱" />
        <el-table-column label="操作" width="100" >
          <template #default="scope">
            <el-button type="primary" icon="Edit" circle @click="handleEdit(scope.row)"></el-button>
            <el-button type="danger" icon="Delete" circle @click="del(scope.row.id)"></el-button>
          </template>
        </el-table-column>
      </el-table>
    </div>
    <div class="card">
      <el-pagination
          v-model:current-page="data.pageNum"
          v-model:page-size="data.pageSize"
          layout="total, sizes, prev, pager, next, jumper"
          :page-sizes="[5, 10, 20]"
          :total="data.total"
          @current-change="load"
          @size-change="load"
      />
    </div>

    <el-dialog title="管理员信息" v-model="data.formVisible" width="35%" destroy-on-close>
      <el-form ref="formRef" :model="data.form" :rules="data.rules" label-width="80px" style="padding: 20px 30px 20px 0">
        <el-form-item prop="username" label="账号">
          <el-input v-model="data.form.username" autocomplete="off" />
        </el-form-item>
        <el-form-item prop="name" label="名称">
          <el-input v-model="data.form.name" autocomplete="off" />
        </el-form-item>
        <el-form-item prop="phone" label="电话">
          <el-input v-model="data.form.phone" autocomplete="off" />
        </el-form-item>
        <el-form-item prop="email" label="邮箱">
          <el-input v-model="data.form.email" autocomplete="off" />
        </el-form-item>
      </el-form>
      <template #footer>
        <div class="dialog-footer">
          <el-button @click="data.formVisible = false">取 消</el-button>
          <el-button type="primary" @click="save">保 存</el-button>
        </div>
      </template>
    </el-dialog>
  </div>
</template>

<script setup>
import { ref, reactive } from "vue";
import {Search} from "@element-plus/icons-vue";
import request from "@/utils/request.js";
import {ElMessage, ElMessageBox} from "element-plus";

const data= reactive({
  username: null,
  name: null,
  pageNum: 1,
  pageSize: 5,
  total: 0,
  tableData: [],
  formVisible: false,
  form: {},
  rules: {
    username: [
      { required: true, message: '请输入账号', trigger: 'blur' }
    ],
    name: [
      { required: true, message: '请输入名称', trigger: 'blur' }
    ],
    phone: [
      { required: true, message: '请输入手机', trigger: 'blur' }
    ],
    email: [
      { required: true, message: '请输入邮箱', trigger: 'blur' }
    ],
  },
  rows: [],
  ids: [],

})

const formRef = ref()

const load = () => {
  request.get('/admin/selectPage', {
    params: {
      pageNum: data.pageNum,
      pageSize: data.pageSize,
      username: data.username,
      name: data.name
    }
  }).then(res => {
    if (res.code === "200") {
      data.tableData = res.data.list;
      data.total = res.data.total;
    } else {
      ElMessage.error(res.msg);
    }
  })
}
load()

const reset = () => {
  data.username = null
  data.name = null
  load()
}

const handleAdd = () => {
  data.formVisible = true
  data.form = {}
}

const add = () => {
  // formRef 是表单的引用
  formRef.value.validate(valid => {
    if (valid) {    // 表单验证通过
      request.post('/admin/add', data.form).then(res => {
        if (res.code === "200") {
          data.formVisible = false
          ElMessage.success('新增成功')
          load()
        } else {
          ElMessage.error(res.msg)
        }
      })
    }
  })
}

const handleEdit = (row) => {
  data.form = JSON.parse(JSON.stringify(row)) // 深拷贝
  data.formVisible = true
}

const update = () => {
  // formRef 是表单的引用
  formRef.value.validate(valid => {
    if (valid) {    // 表单验证通过
      request.put('/admin/update', data.form).then(res => {
        if (res.code === "200") {
          data.formVisible = false
          ElMessage.success('修改成功')
          load()
        } else {
          ElMessage.error(res.msg)
        }
      })
    }
  })
}

const save = () => {
  data.form.id ? update() : add()
}

const del = (id) => {
  ElMessageBox.confirm('删除后无法恢复，您确认永久删除该行数据吗?', '确认删除', { type: 'warning' }).then(res => {
    request.delete('/admin/delete/' + id).then(res => {
      if (res.code === "200") {
        ElMessage.success('删除成功')
        load()
      } else {
        ElMessage.error(res.msg)
      }
    })
  }).catch(err => {})
}

const handleSelectionChange = (rows) => {   // rows 是实际选择的数组
  data.rows = rows
  data.ids = rows.map(item => item.id) // map可以把对象数组转换成纯数字数组
}

const deleteBatch = () => {
  if (data.rows.length === 0) {
    ElMessage.warning('请选择要删除的数据')
    return
  }
  ElMessageBox.confirm('删除后无法恢复，您确认永久删除该行数据吗?', '确认删除', { type: 'warning' }).then(res => {
    request.delete('/admin/deleteBatch', { data: data.rows }).then(res => {
      if (res.code === "200") {
        ElMessage.success('批量删除成功')
        load()
      } else {
        ElMessage.error(res.msg)
      }
    })
  }).catch(err => {})
}

const exportData = () => {
  let idsStr = data.ids.join(",") // 把数组转换成字符串 [1,2,3] -> "1,2,3"
  let url = `http://localhost:9999/admin/export?`
      + `username=${data.username === null ? '' : data.username}`
      + `&name=${data.name === null ? '' : data.name}`
      + `&ids=${idsStr}`
  window.open(url)
}

const handleImportSuccess = (res) => {
  if (res.code === "200") {
    ElMessage.success('批量导入成功')
    load()
  } else {
    ElMessage.error(res.msg)
  }
}
</script>
